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2.1.4. Paper Handling Mechanisms
During the normal operation, paper is fed to the printer, advanced to the specified position, and ejected from
the printer. These paper-handling operations are performed by various paper handling mechanisms, such as
tractors, platens, rollers, and gears. This section describes the printer’s paper handling mechanisms.
2.1.4.1. Release Lever
The release lever is used to select friction for rear /front tractor feed or to release the paper for pull tractor
feed. Changing the release lever position moves the paper guide rollers, and the new lever position is detected
by 2 release switch sensors (RLSW1 and RLSW2). See the following table.
Table 2-3. Release Lever Position
Release Lever
Position
Status of Paper Guide Rollers RL SW 1 RL SW 2
Friction mode The paper guide rollers are
pressed against the platen
Open Open
Front push tractor
mode
The paper guide rollers are
separated from the platen
Closed Open
Rear push tractor
mode
The paper guide rollers are
separated from the platen
Closed Open
Pull tractor mode The paper guide rollers and the
rollers for the lower paper guide
are separated from each
position.
Closed Closed
Figure 2-4 Release Switch
Operating Principles FX-2170 Service Manual
2-4 Rev.A